Animan Posted June 19, 2011 Share Posted June 19, 2011 I recently ordered two 4464 chips to upgrade the RAM in my 600XL. I was reading the instructions, but I found those ASCII pictures a bit confusing. Does any have any pictures of the steps it takes to upgrade the RAM, or is anyone willing to take pictures? The ASCII pictures might make more sense once I actually start doing it, but I have worries. One other thing, too: Any tips on how to unscrew those hex nuts that are holding down the metal shielding? They are placed in such a way it's hard to get any of my tools on them. Quote Link to comment Share on other sites More sharing options...
sloopy Posted June 19, 2011 Share Posted June 19, 2011 this is what i use... if you need an actualy pic let me know i have 2-3 600XL's with this upgrade in it... sloopy. Subject: UPGRADE: 600XL->64K From the February 1988 issue of Michigan Atari Magazine by Don Neff. This memory upgrade requires 3 short lengths of wire and two memory chips (HM50464P or equivalent 4464) to provide a full 64K. _____________________________________________ MAKING THE MODIFICATION: Open the case of your 600XL and remove the circuit board. The 4416 (4 bit x16K) memory chips, U11 and U12, are located at the front right corner of the cartridge holder. Gently remove both of these chips and replace them with HM50464P (4 bit x 64K) memory chips (or 4464 equivalent). Remove U16 (a 74LS51 chip to the left of U11) and bend pin #8 up so it sticks straight out from the chip body as shown in Figure 1. Insert U16 back into its socket. Unsolder and lift the lead of resistor R36 (as indicated at point "Y") in Figure 1. Solder a jumper wire between this resister lead and pin #8 of U16 (point "X"). Insulate the ends of the jumper so that they will not touch other parts of the circuit. of the circuit. Locate U5 and U6 (74LS158) which are directly in front of U11 and U12. These chips handle the row and column addressing inside the memory matrix. We have to add two lines to these chips. Gently remove U5 and bend pin #3 up so it sticks straight out from the chip body as shown in Figure 2. Insert U5 back into its socket. Now remove U6 and bend pin #10 out and replace it back in its socket. Notice that the two pins you bend are nearly touching the other chip. Cut enough off of each of the two pins to prevent any shorts. Locate U14 which is to the left of U5 and U6. Notice the circuit traces to the left of U14. We are interested in the two traces indicated in Figure 2 as points "C" and "J". Connect the jumper from the pad at point "C" to point "D" (pin #3 of U5). This jumper sends address bit A15 to U5. Connect jumper from the pad at point "J" to point "K" (pin #10 of U6). Make sure all your IC ships are inserted properly with their #1 pins in the lower left corner. Check your jumper wiring agains Figures 1 and 2. You should have a jumper from point "X" to point "Y". You should have a second jumper from point "C" to point "D", and a third jumper between points "J" and "K". Make sure the jumper ends are insulated to prevent shorts with nearby objects. Reassemble your computer case and run the memory self test as a final check. If all has gone well, you should now have the same memory capacity as a stock 800XL. U12-------------- R36 R38 ----> ) 4416 | | | Replace with | -------------- |^| |^| HM50464p (4464) |_| |_| | U11-------------- | | -----> ) 4416 | 0(Y) 0 (X) -------------- | \ /----------------------------------| Unsolder and U16 |_|_|_|_|_|_|_ Lift pin here lift here | 8 | ) 74LS51 | |o_____________| | | | | | | | (FIGURE 1) U5 |_|_|_|_|_|_|_| U14 | | |_|_|_|_|_|_|_| ) 74LS158 | Board || | | | |o___3__________| Lift Traces || | ) 74LS158 | | | | | | | | | pins as || | |o______________| ___________D _____ indicated. / | | | | | | | | | | | K | | C | | U6 |_|_|_|_|_|_|_| | 0 0 0 0 __Connect to pad C_____| | 10 | | | | | J ) 74LS158 | | / / / / __Connect to pad J____ |o______________| | / / / / | | | | | | | | | | __|_|_|_|_ | | | |__________________________| U9 | __________| (FIGURE 2) Craig Lisowski (clisowsk@mcs.kent.edu) 2 Quote Link to comment Share on other sites More sharing options...
Animan Posted June 19, 2011 Author Share Posted June 19, 2011 (edited) Yep, that was the same one I was using. Even just a picture of what the final result looks like will be good enough. Edited June 19, 2011 by Animan Quote Link to comment Share on other sites More sharing options...
St(r)yker Posted June 19, 2011 Share Posted June 19, 2011 1. Usuń scalak U18 (74S32) i zewrzyj otwory po pinach 8 i 10. 2. Wyjmij scalaki U5 i U6 (74LS158). Odegnij piny: w U5 pin 3, w U6 pin 10. Włóż scalaki na powrót na właściwe miejsce tak, by odgięte piny nie stykały się z niczym. 3. Połącz pin 3 U5 z A14, a pin 10 U6 z A15. Gotowe Gdy nie ma podstawek - trzeba wylutowywać. Use Translator google ;p Quote Link to comment Share on other sites More sharing options...
Roydea6 Posted June 19, 2011 Share Posted June 19, 2011 (edited) A14 and A15 can be found several places on the Motherboard. pin 9 and pin 15 18 and 20 at PBI Edited June 19, 2011 by rdea6 2 Quote Link to comment Share on other sites More sharing options...
St(r)yker Posted June 19, 2011 Share Posted June 19, 2011 Foto Quote Link to comment Share on other sites More sharing options...
sloopy Posted June 19, 2011 Share Posted June 19, 2011 here is what it looks like in one of my machines... sloopy. Quote Link to comment Share on other sites More sharing options...
russg Posted June 20, 2011 Share Posted June 20, 2011 (edited) Yep, that was the same one I was using. Even just a picture of what the final result looks like will be good enough. There's a screw holding down the board and case in the hole in the upper left of the upper side of the metal shielding that is the trick to getting the case and board out. You don't need to replace that screw when you put it back together. Red circle in the picture. Once you get that screw loose, the entire board and shielding come out and you can remove the hex nut screws from the bottom phillips screws. Once you get the sheilding off, the ASCII picture becomes pretty clear, and others have posted pics of the mb. Edit: The removal is a little hard, you have to lift the left side and wiggle the SIO and joy port jacks out. It sorta snaps to put it back in. Edited June 20, 2011 by russg 1 Quote Link to comment Share on other sites More sharing options...
russg Posted June 20, 2011 Share Posted June 20, 2011 Foto Seems R36 wire not here. Quote Link to comment Share on other sites More sharing options...
sloopy Posted June 20, 2011 Share Posted June 20, 2011 easiest way to pull the 600XL board out, is lift the left side, and gently push the back wall to the left of the SIO jack until it clears... comes right out... sloopy. Quote Link to comment Share on other sites More sharing options...
russg Posted June 20, 2011 Share Posted June 20, 2011 (edited) here is what it looks like in one of my machines... sloopy. I don't see any wires Sloop. Edit: Oops, your wires are small and my eyes need glasses. Edited June 20, 2011 by russg Quote Link to comment Share on other sites More sharing options...
Animan Posted June 20, 2011 Author Share Posted June 20, 2011 Thanks for all the help. I'll get to work as soon as my 4464 chips come in. Quote Link to comment Share on other sites More sharing options...
a8maestro Posted July 5, 2011 Share Posted July 5, 2011 I did this drawing for my kit... http://morethangames.a8maestro.com/proda8/adv-ek0042.htm I recently ordered two 4464 chips to upgrade the RAM in my 600XL. I was reading the instructions, but I found those ASCII pictures a bit confusing. Does any have any pictures of the steps it takes to upgrade the RAM, or is anyone willing to take pictures? The ASCII pictures might make more sense once I actually start doing it, but I have worries. One other thing, too: Any tips on how to unscrew those hex nuts that are holding down the metal shielding? They are placed in such a way it's hard to get any of my tools on them. Quote Link to comment Share on other sites More sharing options...
Rybags Posted July 5, 2011 Share Posted July 5, 2011 15 bucks !?! WTF? Nice little profit there. Quote Link to comment Share on other sites More sharing options...
spookt Posted July 5, 2011 Share Posted July 5, 2011 15 bucks !?! WTF? Nice little profit there. Not sure it's too unreasonable. You get the two chips, wire and a nice clear diagram. I didn't pay so much less than that for the two RAM chips on eBay. Quote Link to comment Share on other sites More sharing options...
Rybags Posted July 5, 2011 Share Posted July 5, 2011 Dunno... I'm sure I've seen 4464s and other generic RAM types that upgrades use in the range of $1.50 - $2.50 each on arcade part sites. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted July 5, 2011 Share Posted July 5, 2011 Spookt and I must be looking on the wrong websites, then. I've commonly paid similar money for a pair of these chips. Quote Link to comment Share on other sites More sharing options...
JamesD Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. Quote Link to comment Share on other sites More sharing options...
kurtm Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. The only catch is that the US model, at least, doesn't have the monitor jack. It can be modified to do so, but *that* upgrade is not as simple as the 64K upgrade. Quote Link to comment Share on other sites More sharing options...
JamesD Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. The only catch is that the US model, at least, doesn't have the monitor jack. It can be modified to do so, but *that* upgrade is not as simple as the 64K upgrade. Yeah, I already looked at that. Nothing I'd call difficult as long as the board in the machine I buy supports the mod. It would probably take me an afternoon to do both mods. Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. The only catch is that the US model, at least, doesn't have the monitor jack. It can be modified to do so, but *that* upgrade is not as simple as the 64K upgrade. Yeah, I already looked at that. Nothing I'd call difficult as long as the board in the machine I buy supports the mod. It would probably take me an afternoon to do both mods. I've done both mods and it does take about an afernoon The output on the monitor port after the mod is about the same as a 800XL but it could be better Quote Link to comment Share on other sites More sharing options...
sloopy Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. The only catch is that the US model, at least, doesn't have the monitor jack. It can be modified to do so, but *that* upgrade is not as simple as the 64K upgrade. Yeah, I already looked at that. Nothing I'd call difficult as long as the board in the machine I buy supports the mod. It would probably take me an afternoon to do both mods. I've done both mods and it does take about an afernoon The output on the monitor port after the mod is about the same as a 800XL but it could be better both the 64k and the 'Jeff Popp' version of the AV mod can be done in about an hour or so, there is another AV mod for the 600XL, and that can be done with 64k mod in about 30-35mins... and every 600XL i have seen the AV mod can be done, but there is a 600XL version it cant be done (easily) on, and i have only known of ONE of these machines in all my years with atari... sloopy. Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted July 5, 2011 Share Posted July 5, 2011 I was thinking of buying an XL model for the top cart slot and was leaning towards the 800XL because it has 64K. But if the upgrade is that easy and the 600XL is smaller I might go for it. The only catch is that the US model, at least, doesn't have the monitor jack. It can be modified to do so, but *that* upgrade is not as simple as the 64K upgrade. Yeah, I already looked at that. Nothing I'd call difficult as long as the board in the machine I buy supports the mod. It would probably take me an afternoon to do both mods. I've done both mods and it does take about an afernoon The output on the monitor port after the mod is about the same as a 800XL but it could be better both the 64k and the 'Jeff Popp' version of the AV mod can be done in about an hour or so, there is another AV mod for the 600XL, and that can be done with 64k mod in about 30-35mins... and every 600XL i have seen the AV mod can be done, but there is a 600XL version it cant be done (easily) on, and i have only known of ONE of these machines in all my years with atari... sloopy. I wonder who has that machine Quote Link to comment Share on other sites More sharing options...
russg Posted July 5, 2011 Share Posted July 5, 2011 15 bucks !?! WTF? Nice little profit there. I don't remember exactly, but I got my chips from Jameco. They were only $1.69 each, but there was a $10 minimum order and like $5 shipping. I believe I also got a de-solder pump for like $8. So, it isn't easy to buy just the two chips. Quote Link to comment Share on other sites More sharing options...
linuxfanman Posted March 4, 2012 Share Posted March 4, 2012 (edited) Thought this would be helpful for people performing this mod.. http://www.youtube.com/watch?v=kMKwd3VL3V0&list=UUVCHJdXkku-72lETWIfeubA&index=1&feature=plcp Edited March 4, 2012 by linuxfanman 1 Quote Link to comment Share on other sites More sharing options...
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